Mechanical shovel



sept. 1s, 1923. Re. 15,685

l S. HOAR MECHANICAL SHOVEL ATTORNEYS sept. 1s, 1923. l

' S. HOAR MECHANICAL SHOVEL Original Filed Sept. l5, 1920 2 Sheets-Shoot 2 fnl/enfer @Maa/70,4@

TToQNEyj Reissued Sept.v 18, 1923.I

STATES yPaxrENi'l OFFICE.

non, or vIneINIA, MINNESOTA, AssIe'Noa rro aux LoAnING AND EN- GINEERING conrm, or nULUTn, mNNEsoTA, A conroaA'rIoN or mma-sou.

' ImcnANIcAL snovm..

' Original 1,448,587, dated Iareh 18, 1928, Serial No. 416,416, med September 15, 1920. .application In! reilne tlled lune 23, 1923. lSerial llo. 647,406.

T o all whom it may'concem:

Beit known that I, SAMUEL Hoax, a 'citizen of. thefUnited States, residing at Virginia, in the county of St. Louis and l State of Minnesota, have invented certain new and useful Improvements in Mechanical Shovels, of which the following is a Specification, reference lbeing had therein to the accompanying drawing. i

This invention relates to mechanical shovels andthe embodiment here illustrated and described is especially desi ed for tunnelin purposes where room or'operating the evic'e may' be considerablyrestricted such as experienced in coal,'iron or other mines and` for which. urpose my presenty invention is particular y designed.

It is evident that this.. or .a slightly mod# ified form may be used with equally good results where open shoveling is required and such machines employed.

The principal. object of the invention is to providel a more practical mechanical shovelthan-heretofore known and one requiring as little space as' possible in which to'operate.

Another' bject of the invention is to provide a vcombination dipper stick which results inv novel flexibility ofthe dipper.

Still otherobjects and advantage of the novel combination of parts willappear in the further description of the invention.

In the accompanying drawings `forming part of this application and in which like' a5 reference characters represent like parts:

Figure 1 is a side elevation partly in section of one embodiment of my Invention;

Figure 2 isa rear elevation, partly in section, of Figure 1;

Figure is a top lan view, partly broken away, of the shoveil position illustrated in Figure 4; and

Figure 4 is aside elevation, partly in section, ofthe shovel with the' dipper'in position for discharging its load into a `train car.

1 represents a car mounted upon four wheels 2--2 and 3-.3, the latter or rear wheels being considerably larger in diameter than the former for the urpose of producing a forward downward) inclination to the body yof the car, the particular objectof which wllappear later.

with the dipper' `in the A turntable having cooperative interlocking parts 4 'and 5 is mounted upon the car body andsupports the ad'ustable superis illustratedy structure, the floor of whic at 6; `This superstructure may be of any desired form of fabrication to provide the necessaryv strong support for the operating parts of the machine. v.

I ,have shown the upright ends of the superstructure as being composed of angle bars 7-7' at the rear end and 8-8 at the forward end, upon the upper 'extremities of which is supported the inclined shovel carriage track andl which comprises two spaced lchannel bars 99 facing inwardly towards each other and which are rigidly fixed in the upper endsof the angles.

Intermediate of the channels 9 9 and reciprocally carried therein is the shovel carriage 10,' it being provided with prefer-l ably three pairs 'of rollers or wheels 11 whlch travel within the channels 9-9 as `clearly shown in Figure 2 of the drawings,v said wheels or rollers 11 being the full de th of the channels to revent undesira le vertical movement of t e carriage.

The carriage 10 is of fabricated construction having the forward end thereof extendin above and beyond the foremost pair of ro 1ers 11, and, pivotally mounted in vsuch extension, as at 12, is the auxiliary dipper stick 13. The auxiliary stick 13 extends rearwardl to a distance approximately equal to t e length of the carriage 10 and is attached to the rear end of mid carriage by a suitable line or chain 14, and in the rear end of the auxiliary dipper stick is mounted a transversely disposed roller 15, which is engaged by the dipper manipulating line 16 w enthedipper 1sv in operation.

On the opposite end' of the auxiliary dipper stick 13- is pivotally mounted as at 17 the principal dipper stick 118 which latter carries upon its forward end the fixed di per 19 and ismanipulated by the line 16 being attached to the opposite end as at 20. A single line only is required for operatin the d1v per as the material engaging en `thereo is at all times heavier than the handle end and will naturally go toits work by gravity. However, -a second line 21 is required for the operation of the carriage passes to a suitable winding drum 29.

Vzes

10 and which second line is attached at one end to the carriage as at 22 and passes to and around a suitable sheave 23 adjacent the rear end of the superstructure ofthe vehicle and from there to and around the driving drum 24, while the opposite end leads forwardly to and around the sheave 25 up to and around a suitable sheave or roller 26 mounted in the rear end of the carriage 10 and thence to a suitable fastening as at 27, adjacent the forward' end of the carriage. B this means it is evident that the rotation of?7 the drum 24 will produce a pull inwardly upon one portion of the line simultaneously with the slackingv ofi' of the other portion and whereby alternate reverse rotation of the drum 24 will producel reciprocation of the carriage. A sheave 28 is installed centrally in the rear of the `superstructure and over which the dipper manipulating line l16 I have shown what are' commonly known as Dake air engines for furnishing power to the various drums and operating mechanism of the shovel, but it is evident that their application or combination with the specific structure'does not enter into the invention as electric or other forms of motors may be employed when desired.

The turntable upon which the superstructure is mounted, is, as before stated, composed of the two interlocking ring sections 4 and 5 which are cooperatively engaged with the base ring or section 30, whic at- 'ter is fixed to the chassis of the vehicle,

there being two sets of bars, one intermediate of the rings 4 and 30, and one intermediate of the rings 4 and 5, thus providing a simple durable antifrictlon bearing for the superstructure. The gear mechanism for operating said superstructure is illustrated at 32, 3,3, 34 and 35, the specific arrangement of which does not constitute'part of my present invention.

The seat lfor -the operator is shown at 36 as conveniently located upon the side of the superstructure and each motor is operated in either direction bya -single lever as indicated at 37, there being three of such motors in themachine, one for rotating the su rstructure, one for reciprocating the carriage and one for manipulatingthe shovel. Y

38 represents a suitable air line to a Asuitable connection for. air hose for supplying power to the motors and I have shown at v'39,*

a convenient'form of rail anchor or holding means for the rear end of thev shovel during its peration to preventv lifting lfrom the It will be noted that the free end ofthe auxiliary dipper stick'l is in no wayV di" rectly attachedto the shovel manipulating line 16, but simply bears upwardly inst the line when the shovel is inthe act o digging, and, when the shovel is drawnv rearmese 'wardly, as shown in dotted lines Figure 1,

in the act of digging, should it become excessively engaged during such act, a continued draft upon the line 16 will tend to force downwardly the free end of the auxiliary dipper stick and thus cause a lifting effect upon the dipperv which willtend to free its hold though not prevent its Subscquent advancement in working, or, in other words, the dipper stick, having two ulcrumed points spaced from each other and one beino automatically operated as above describe provides an extremely desirable iiexibility of the dipper while at work.

In respect to the inclination of the car or vehicle 1 -upon wheels greater in diameter in the-rear than in the forward end thereof, p

it will be noted that `when the dipper is swung about with its load upon such inclined vehicle it will be simultaneously elevated and turned, thus enabling the dipper to discharge its load in the highest tram car possible with the minimum elevation of the dipper, as it is understood that this shovel is designed particularly for tunnel work where space both vertically and horizontally p 2. In a mechanical shovel, thecombina tion with a vehicle, having a turntable thereupon, of a lsuperstructure supported upon "the turntable, an inclined track carried by the superstructure, a reciprocal carriage carried b the superstructure, an `auxiliary dipper stick pivotally carried upon the car. riage, a dipper stick and dipper carried nipon the auxiliary stick, and a single line for simultaneously operating both dipper sticks. l

3.. In a mechanical shovel, the combination with a vehicle having a turntable thereiipompof a superstructure .supported upon theturntable, a carriage reciprocally carried fin tl" superstructure, an auxiliary dipper stick pivotally carried upon the carriage, a dipper stick and dipper carried upon the auxiliary stick, independent means for operating the carriage and the superstructure, and a single line for simultaneously opers both dipper sticks.

"4, n combmation a vehicle, a superstructure, upon the vehicle, an auxiliary dipper .seick pivotally carried by the superstructure,

a dipper stick and dipper a single operating line attached to the combined dipperv and stick, and means carried by the auxiliary stick engaging said line and operatin the auxiliary stick for the purpose describe 15. In a. mechanical shovel the combination with a portable vehicle, of an auxiliary di per stick pivotally carried thereupon, t e pivotal point being spaced from the lower end of the stick, a combined dipper stick and dipper pivotally carried upon extreme lower end of the auxiliary dipper stick, a. singlev attached to the operating line permanentl th free d of e en dipper-carrying stick, an

the auxiliary stick engaging said line for the purpose described.

6. In a mechanical shovel, the combina.-

tion with a portable vehicle, of an auxiliary dipper stick pivotally and reciprocably carried thereupon, the pivotal point being spaced from the lower end of the stick, a combined dipper stick and dipper pivotally carried upon the extreme lower end of the auxiliary di per stick, a single operatin line attached) to the dipper-carrying stic and engaging the-free end of the auxiliary stick, means -for limiting .the upward motion of the upper end of the auxilia stick,

and means on ,thel vehicle for operatlng the line, substantially as described.

7. A mechanical shovel comprising a ro- 'tatable structure inclined'to a horizontal, a

traveling carriage mounted on said structure, an auxiliary stick pivotally'sup rted from the carriage, a stic carryin a sipper pivotally supported from thev auxia stlck, and flexible means connected to the 'ppercarrying stick and bearing upon the auxiliary stick. Y

8. A mechanical-shovel com rising a rotatable ystructure inclined toa orizontal, a carriage supported to travel the incline of the structure, an auxiliary and a dippercarrying stick both supported by the' car kried u on the auxiliary stick, an

riage and foldable one upon the other over the rotatable structure.

9; `A mechanical shovel comprising -a supportinv structure, an auxiliary dipper stick y supported from the structure, a

pivota main di er stick pivotally supported from the auxlliary stick 'below the pivot of the latter, and carrying a dipper, and flexible means connected to the upperend of the main stick and slidable upon the upper end of the pivoted auxiliary stick.

10. A mechanical s ovel comprising a turntable, a superstructure supported on the table, a pivoted auxiliary stick, a di per stick and dipper pivotall su ported om the auxiliary dipper stic be ow the pivot of the latter, and a cable means having a running bearing upon the auxiliary` dipper stick and connecting the other dipper stick with means for exerting a pull on the cable means.

11. A mechanical shovel comprising a rotatablev sup ort, 'a traveling carriage sustained by t e support, an auxiliary dipper stick pivotally supported from the traveling carriage, a dipper stick and dipper pivotall su ported from the auxiliary dip er stic be ow the pivot vof ythe latter, an a cable connected to the dipper stick carrying the dipper and bearing. upon the auxiliary dipper stick.

12. In a mechanical shovel, the combination with a vehicle, a superstructure supported to turn upon the ve icle, a track carried by the su rstructure, a reciprocable carriage carri b the superstructure, an auxiliary dipper stick pivotallycarriedupon the carnage, a dipper stickvand 'di per cara single line or simultaneously operating both dipper sticks.

n witness whereof, I have hereunto set my handgthis 23rd day of July, 1923.

SAMUEL HOAR. 

